baber/WOPTO huggingface dataset:
Patent GB-732301-A (GB)
Title: Improved switch mechanism particularly for electrical traction vehicles
IPC: H01H19/56
Filed: 1953-05-15
Abstract: 732,301. Control of D.C. motors; controllers. GENERAL MOTORS CORPORATION. May 15, 1953 [June 3, 1952], No. 13603/53. Class 38 (3). A reversing switch for electric traction motors comprises contact carriers 4 attached to contacts 16 by means of flexible conductors 10, three contacts being associated with each carrier. The contacts are slidably mounted by means of guide pins 18 and limited in movement by connecting rods 20 threaded to studs 24 and carrying an abutment 22 and helical spring 26. An insulated rotatable shaft 27 carries bus-bars 34 which each have a long segment 36 and two short segments 38. Each traction motor is associated with two bus-bars and four sets of contacts, so that the motor field is reversed by joining opposite sets through the segments 38 or by connecting adjacent sets through the long segments 36. A defective motor may be isolated by retracting a selected set of the contacts 16, a movable attachment 50 being provided for this purpose. The attachment is prepared for connection to the reversing switch by pulling out a spring detent 58 from a recess 60, a lock 54 then being turned in the counterclockwise direction by fingers 56 so that finger 64 clears a key bar 62. The key bar is then pulled out from the attachment which is placed over three of the studs 24 so that prolongations 92 extend between the studs. The key bar 62 is pushed back and key pins 102 on it pass between the narrower parts of the studs 24 and engage indentations 94 on the prolongations 92, thus locking studs 24 to a lifter 74. The key bar is locked in place by turning the look piece 54 clockwise so that finger 64 re-engages key bar 62 and detent 58 re-enters recess 60. To disconnect one of the traction motors, a handle 52 is turned through 180 degrees so that cam 82 forces roller 90 on the lifter 74 upwards towards a button 68 on a low voltage control switch 66 against springs 80. The studs 24 and connecting rods 20 are thereby pulled upwardly so moving the contacts 16 out of the path of the segments 36, 38. The roller 90 ultimately operates the low voltage control switch by means of the button 68. The traction motors are adapted for series-parallel control and are supplied from a diesel engine-driven generator, Fig. 6 (not shown). When the handle 52 is turned to disconnect one of the motors, the operation of the switch 66 has the effect of connecting the remaining motors in parallel across the generator and reducing the generator excitation so that the generator is not overloaded for an appreciable length of time.
Patent GB-958526-A (GB)
Title: Improvements in end to end joints for pipes, rods and the like members
Inventor: GOWARD STANLEY HAROLD
IPC: F16L37/088
Filed: 1961-04-17
Abstract: 958,526. Pipe couplings. BTR INDUSTRIES Ltd. April 16, 1962 [April 17, 1961], No. 13720/61. Heading F2G. A pipe joint comprises two pipes having longitudinal, interengaging projections 2, 5 and at least one peripheral groove formed in the interengaging region with at least one part of the groove being in each pipe. A locking ring 1 is housed in the groove and a sealing means including a sleeve 9 is provided within a counterbore in each pipe end. In the construction shown in Fig. 1 two pipes 6, 7 each possess three equally spaced castellations. The ends 31 of the locking ring are bent outwardly from the plane of the clip, the ends co-operating with a flat 3 of a pipe to prevent rotation of the ring. The inner ends of the counterbores may be tapered a sleeve of P.T.F.E. supported by a metal sleeve (Fig. 4, not shown) or of P.T.F.E. which is preshrunk and then expanded within the joint (Fig. 5, not shown) forming the seal. A groove and chamfer may be provided at the root and outer ends of the projections respectively so that a circlip may be introduced into the groove prior to the joint being effected, the circlip being subsequently moved into the peripheral groove (Fig. 6, not shown). The ends of the locking ring may be chamfered inwardly to facilitate its removal from the joint (Fig. 7, not shown).
Patent GB-515620-A (GB)
Title: Improvements in or relating to tubular heat exchange apparatus applicable to economizers for steam generators
IPC: F22D1/06
Filed: 1938-05-09
Abstract: 515,620. Pipe connections for heat-exchangers. MARINE & LOCOMOTIVE SUPERHEATERS, Ltd., (formerly SUPERHEATER CO., Ltd.), and WYNN, S. P. May 9, 1938, No. 13766. [Class 99 (i)] In serpentine units for heat exchange apparatus having straight tubes connected to junction boxes by screws extending into clamp blocks, the blocks determine the spacing of the tubes and are slotted to permit any tube to be withdrawn without disturbing any other tube or any block. As shown in Fig. 4, spherically seated washers 15 on studs 4 passing through a junction box 2 draw a clamp block 3 against abutments 10 on the tubes 1 to hold spherical jointing surfaces 9 on the ends of the tubes in engagement with conical apertures 11 in the junction box. Each clamp block 2, Fig. 5, has slotted U-shaped arms to engage the abutments 10. The blocks are juxtaposed and cut away to form an enlarged slot 18. After four adjacent junction boxes have been removed a tube may be moved through the splayed ends 17 of a slot 12 into the slot 18 and withdrawn for inspection &c. To prevent access of combustion gases to the joints, rings 19 of copper-asbestos are provided between the abutments 10 and the junction boxes. The rings of a pair of tubes may be formed as a unit and the parts between the tubes may be brought together and secured by a rivet to hold the tubes in position when the junction box is removed For the modified construction shown in Fig. 8, each clamp block has a slot with closed ends 120 and an enlarged intermediate portion 180 through which the tubes can be removed. To facilitate differential expansion of the tubes parts 20 of the abutting surfaces of the blocks may be cut away. If the tubes are arranged vertically a single slotted clamped bar, supported at its ends and/or at points along its length, may be employed instead of a clamp block for each pair of tubes. The invention is applicable to a group of two, three or more tube lengths united at each end into a single end portion. Metal strips may be welded between the tubes of a group to form a girder-like structure. Specifications 411,633 and 418,853, [Group XXII]), are referred to. '
Patent GB-690343-A (GB)
Title: Improvements relating to metal flooring
IPC: E04C2/42
Filed: 1950-06-02
Abstract: 690,343. Treads. CROWTHER (ROYTEN), Ltd., S., and CROWTHER, J. June 1, 1951 [June 2, 1950], No. 13822/50. Class 20(iv) [Also in Group IX] A non-slip surface, on a metal floor unit comprising straight and curved metal members 1-4, riveted together, is formed by projections 6 made by pressing the edges of the strips 3, 4 so as to form a small recess on one side of the strip and a rounded projection from the other side. The projections are formed on both sides of the floor unit.
Patent GB-252890-A (GB)
Title: Improvements in engine and tank attachments for motor cycles
IPC: B62J35/00
Filed: 1925-05-27
Abstract: 252,890. Douglas Motors, Ltd., and Pullin, C. G. May 27, 192S. Motor cycles; motors, supporting; fuel and ,other liquid containers.-The engine crank-case 5 and oil tank 6 are secured to a lug or platform 4 on the frame 2, 3 by a single hollow threaded pivot pin 8 with a head 9. The platform may be formed with jaws 12 to take depending setpins on the crank-case.
Patent GB-1182861-A (GB)
Title: Compositions Containing Light-Sensitive Diazonium Salts
Inventor: HAIST GRANT MILFORD
IPC: G03C1/58
Filed: 1968-03-22
Abstract: 1,182,861. Photo-sensitive diazotype materials. EASTMAN KODAK CO. March 22, 1968 [March 22, 1967], No. 13862/68. Heading G2C. A heat-developable, two-component diazotype composition comprises a mixture of a diazonium salt and a coupling component of formula:- wherein Z is a sulphur or oxygen atom, and R is alkyl, substituted alkyl such as hydroxyalkyl, cycloalkyl or alkoxy group. This composition is preferably mixed with a cellulose ether or ester and an acid stabilizer such as a sulphamic acid and coated on a transparent polymeric support. This material is imagewise exposed and developed by heating to produce a dye image which may be used as an intermediate master.
Patent GB-819474-A (GB)
Title: Contact lenses
IPC: B29D11/00
Filed: 1955-05-13
Abstract: 819,474. Moulding contact lenses. RIDLEY, F. T. Aug. 3, 1956 [May 13, 1955], No. 13863/55. Class 87(2). A method of making a contact lens from plastic matreial, e.g. methyl methacrylate, comprises heating the material in a moulding tool, placing a plaster mould in the tool, placing the tool in a moulding press to mould the material into a lens on the plaster mould and applying cooling means to the tool as soon as the lens is moulded. The press comprises platens 2, 38 with heating and cooling means and connections 48, 39 to sources of compressed air and vacuum respectively. The moulding tool comprises members 4, 26 clamped together by clips 28, having coaxial bores 6, 32 the member 4 having a projecting ring 8 and spring loaded annulus 10. In operation a sheet of plastic material 20 is located in the moulding tool by ridges 18, Fig. 2 (not shown), on the member 4, the tool is closed by the clips 28 causing the annulus 10 to clamp the sheet in position against the member 26 and the tool and contents is then heated, e.g. in an oven. A plaster mould 40 and a packing piece 44 are then placed in the bore 32 above the plastic sheet 20, the tool is placed in the heated press, the press closed, vacuum applied through the connection 39 to draw the sheet 20 against the mould 40 and compressed air is then admitted through the connection 48 to fully mould the lens. After moulding the press is cooled and when the moulding tool is cool it is removed from the press, the ring 8 removed and replaced by a longer shearing ring, the packing piece 44 is removed and the moulding tool replaced in the press which, on closing, causes the shearing ring to shear the moulded lens from the sheet 20 and to lift the lens and mould into the bore 32. A method of making the mould 40 is described.
Patent GB-1491393-A (GB)
Title: Formation sampling apparatus
IPC: E21B4/14
Filed: 1976-04-07
Abstract: 1491393 Boring earth &c. BAKERDRILL INC 7 April 1976 [7 July 1975] 14033/76 Heading E1F Apparatus for obtaining formation samples from the bottom of a borehole H includes a bit 10 mounted in a housing 10, the bit 10 having passages 16, 15 into which cuttings are conducted by fluid discharged into the hole H in the region of the bit, and a sealing sleeve 24 on the housing 20, fluid being directed above and below the sleeve 24 to provide a zone of static fluid around the sleeve 24 creating a fluid barrier to the movement of cuttings past the sleeve 24. As described the drill is a pneumatically operated percussive down-the-hole drill which is fixed to a rotating concentric dual drill pipe string (not shown), compressed air being supplied down the annulus between the inner and outer pipes and the cuttings being returned up the inner pipe, the inner pipe being connected via tubes 73 and 75 to the passages 15, 16 in the bit 10. Compressed air passes from the pipe string annulus to inlet passages 90 and then alternately through ports 100, 105 above and below a hammer piston 31 to cause the hammer piston 31 to reciprocate and strike the anvil 11 of bit 10. Air also passes continuously from passages 90 through ports 91, 93 and passages 94, 95, 96 to emerge at 97, the air then passing over the bit 10 to conduct cuttings up the passages 16, 15 in the bit 10. Air from above the hammer piston 31 is exhausted through ports 107, 109 into the annulus between the housing 20 and borehole H. Air from below the hammer piston 31 is exhausted through ports 110, and passages 111, 113, 114, 115, 116 to emerge at outlets 117, 118 below and above the sleeve 24. The areas of outlets 117, 118 are chosen to provide the same pressure at opposite sides of the sleeve 24, thereby resulting in a zone of static air around the sleeve 24 to prevent the cuttings from passing upwardly past the sleeve 24.
Patent GB-556071-A (GB)
Title: Improvements in means for safeguarding electric igniters of blasting detonators against accidental firing
IPC: F42B3/18
Filed: 1941-10-31
Abstract: 556,071. Protective arrangements. ROLFES, Ltd., and ROLFES, H. J. Oct. 31, 1941, No: 14060. [Class 38 (iv)] [Also in Group XXI] Means for safeguarding an electric igniter of a blasting detonator from atmospheric electricity comprises the combination of (a) a mass which is in contact with each lead or with extensions thereof and which offers a high resistance to voltages of the magnitude used for intentionally firing the igniter and a low resistance at voltages substantially higher than said firing voltages and caused by atmospheric electricity, and (b) discharge points disposed on or opposed to the leads or extensions in such a position as to promote the discharge from either or both of the leads or extensions through the mass. The mass, which is earthed, may be the " coherer mass" described in Specification 555,969, or may be galena, yellow crystalline iron pyrites, or zincite. In Fig. 2, which shows a wax primer, the discharge points 23, 24 are formed on bare parts of conductors 1a, 1b which end in a bridge-wire 8 which, on firing, is heated to incandescence. The points are embedded in a discharge layer 21 which is in contact with rock or with the side of the borehole. The discharge mass may be in the form of a plug contained in an earthed metal casing, and the discharge points may be on the inside of the casing. Two plugs may safeguard one detonator. The plug may be disposed exteriorly of the detonator, as in Specification 555,969. The discharge points may be constituted by two strips of metal foil' adhesively secured to the opposite sides of a I-shaped piece of cardboard embedded'in a discharge mass contained in a casing connected to the detonator by a copper wire and a sleeve.
Patent GB-1142124-A (GB)
Title: Improved pulse modulation control system for electric motors
Inventor: THIELE TOM NEIL
IPC: H02P7/29
Filed: 1967-03-28
Abstract: 1,142,124. Transistor pulse circuits. ALLIS-CHALMERS MFG. CO. 28 March, 1967 [4 April, 1966], No. 14083/67. Heading H3T. [Also in Division H2] In a system in which a motor 20 is energized with pulses of variable on/off ratio from a source 10 through a switching means 30, current limiting is provided by terminating any pulse in which the voltage across the power switch 30 exceeds a predetermined level, but means are provided for de-activating the limiting circuit when the voltage is at a second, higher level, indicating that the switch is open. The frequency of the pulses is constant and depends upon an astable complementary multivibrator 40. In this, an initially charged capacitor 43 discharges through resistor 49 until diode 46 conducts and switches on transistor 41. This charges a capacitor 52, the charging current turning on a second transistor 42 causing the output at B to go positive and capacitor 43 to be re-charged through 41, 46 and 42, 44. When 52 is fully charged, 42 is cut off, causing B to revert to the negative potential of line 12 making A more negative which cuts off 41 and the cycle repeats. Diodes 45, 47 by-pass transients and capacitor 18 and diode 16 are for de-coupling. Reverse biasing for 42, and also for the power transistor switch 30, is provided by circuit 80, in which capacitor 81 is charged when 42 is off, its upper plate being negative; this plate is connected to positive line 14 through 42 when this turns on, and 81 discharges through 83 into capacitor 85, making its upper plate more positive than line 14 to provide reverse bias. Circuit 60 modulates the pulse width applied to the motor; the positive pulse at B causes conduction of 62 and charging of capacitor 81. At the end of the pulse, diode 63 is reverse biased, turning off 62 for a time determined by the discharge of 81 through speed setting variable resistor 64 and diode 66. At the end of this time 62 turns on again until the end of the next positive pulse at B. Conduction of 62 turns on transistor 70 through a Zener diode 72 which prevents base of 70 being connected to positive line 14 when current limit circuit 90 operates. Conduction of 70 turns on the modified Darling- ton switching circuit comprising driving and power transistors 31, 32. If required several switching circuits in parallel may be used. Current limiting circuit 90 comprises voltage divider 95, 96, 97 and tunnel diode 98. When the current through switch circuit 30 is high enough, the resulting potential breaks down the tunnel diode 98 causing transistor 78 to conduct to trigger thyristor 77 which thereby causes Zener diode 72 to block, turning off transistor 70 and hence switch 30. 77 turns off when transistor 62 becomes non-conductive. A thermistor 99 provides temperature compensation and capacitor 86 rapid response. The purpose of the limiting circuit is to protect the control circuitry. When 30 is off the voltage across it is high enough to cause a transistor 94 to conduct and short circuit the limiting circuit.
Patent GB-105032-A (GB)
Title: Improvements in Bed-couches.
Inventor: STEWART WILLIAM WALTER
IPC: A47C17/207
Filed: 1916-10-05
Abstract: 105,032. Stewart, W. W., Oct. 5, 1916. Bedsteads convertible into sofas.-A convertible couch and bedstead comprises a lower frame supported by the legs D, and an upper frame carrying an arm or back E and supported thereby when the upper frame is unfolded. Separate mattresses G, H are placed on the laths of the frames to provide a resting surface. Reference has been directed by the Comptroller to Specifications 28709/03 and 4857/06.
Patent GB-119106-A (GB)
Title: Improvements in Evaporating and Distilling Machinery.
Inventor: URQUHART DAVID
IPC: B01D1/10
Filed: 1917-10-02
Abstract: 119,106. Urquhart, D. Oct. 2, 1917. Generating by indirect contact of gas-engine exhaust; water-tube boilers; multitubular boilers.- To utilize the heat of exhaust gases from internalcombustion engines, especially on board ship, for distilling sea-water, the exhaust gases are made to heat a steam boiler containing distilled water, the steam produced being used for evaporating sea-water in a surface-apparatus, and the water condensed in this apparatus is returned to the hoiler. Figs. 1 and 2 show a water-tube boiler suitable for this purpose. Headers d<1>, d<2> are attached to a drum e and project into a casing b through which the exhaust gases pass. Watertubes d are connected to the headers d<1>, d<2> and to corresponding headers d<3>, d<4> connected to the drum e as shown. Baffle plates d<6>, d<7> are attached to the headers d<1>, d<2> to prevent eddies in the gas current. Figs. 4 and 5 show a fire-tube boiler for the same purpose. The tubes j pass through tube plates k, l and are expanded into a trumpet-shape at their ends, which are made of hexagonal-shape so as to occupy the whole crosssection of the casing of the boiler.
Patent GB-332661-A (GB)
Title: A new or improved process of producing embossed designs or the like upon metal sheets
IPC: B41M1/28
Filed: 1929-05-07
Abstract: 332,661. Gmach, L. T. May 7, 1929. Embossing.-To produce embossed designs on metal or other sheets, the sheet is coloured and varnished and a sheet of coloured metal foil applied. The composite sheet is acted upon by an embossing-die with sunk design in a press until the foil adheres to the flat portion of the sheet and the foil is cracked at the edges of the design. The foil covering the design is then removed to expose the original sheet.
Patent GB-342229-A (GB)
Title: Improvements in the production of water gas
IPC: C10J3/00
Filed: 1930-05-09
Abstract: 342,229. Materials for making water gas. McGREGOR, T., Norton Hall, The Green, Norton-on-Tees, and IMPERIAL CHEMICAL INDUSTRIES, Ltd., Millbank, London. May 9, 1930, No. 14303. [Class 55 (ii).] In the production of coke for water gas generators, coal is treated for the removal of part of its natural ash content to raise the ash melting point of the coke obtained therefrom. A temperature of at least 1450‹ C. is specified and may exceed 1470‹ C. The coal may be treated by flotation processes to a predetermined specific gravity. In an example, the raw coal has an ash content of 14À5 per cent and a melting point in saturated water gas of 1400‹ C. The part floating in a solution of specific gravity 1.6 has an ash content of 9À26 per cent and a melting point greater than 1470‹ C.
Patent GB-1459432-A (GB)
Title: Jamming signal simulating equipments
IPC: G01S7/40
Filed: 1973-03-24
Abstract: 1459432 Radar MARCONI CO Ltd 30 Jan 1974 [24 March 1973] 14303/73 Heading H4D For the training of radar personnel in the appearance of swept frequency Carcinotron type jamming, wherein the jamming frequency repeatedly sweeps through the pass band of the radar receiver and produces a pulse response of width determined by the reciprocal of the bandwidth, a simulator, working at IF and therefor avoiding the cost and complexity of R.F. simulators, comprises an IF generator 2 feeding its output to an output terminal 1 (for connection into the IF stage of the radar) via a gate 5 which is enabled by the output of a variable prf pulse generator 15 having the required pulse width. Switches 3, 4 enable the use of wide band noise (12) or narrow band noise (12, 13) instead of the IF signal as the interference carrier, while switch 14 enables the use of a variable pulse width pulse train (17, 19) instead of the variable prf pulse train as the gate control signal, as well as a continuous jamming signal (earth connection 16). The variation of the prf of the output of pulse generator 15 enables the simulation of swept frequency jamming with different rates of sweep. The seven kinds of jamming which can be simulated, and the positions of switches 3, 4, 14 to obtain them are as follows To simulate the effects of receiving the jamming signals on the main lobe and/or side lobes of the radar aerial, various attenuators 6, 7, 8, 9 are switched into the feed to output terminal 1, under the control of output from a decoder 20 receiving signals from photodetectors 21 receiving the light passing through holes in a disc 23 from a source 2, the disc rotating with the aerial and the angular position of source 2 and detectors 21 being variable to set the required "bearing" of the jammer. A variable attenuator 11 controls the overall strength of the output signal.
Patent GB-388718-A (GB)
Title: Improvements in and connected with cinematographic apparatus
IPC: G03B1/56
Filed: 1931-05-14
Abstract: 388,718. Kinematograph apparatus. COUADE, M., 7, Rue Jean Menans, Paris. May 14, 1931, No. 14327. Convention date, May 14, 1930. Void [Published under Sect. 91 of the Acts]. [Class 97 (i).] The film 7 is fed along a curved gate track 5 stepped at 6 to accommodate films of different widths. Blade springs 9, carried by the gate 3, hold the film in the track. The film passes over spring tension members 11, 26, 27 having saddle-shaped ends and around friction members 24, 25. The feed and take-up spools 12, 18 are provided respectively with friction collars 14, 20 embracing the hubs 13, 19, the collars being embraced by light rings 16, 22 with intervening springs 17, 23. Stoppage of the film by disengaging it from the feed claw 8 is effected either by a hand-operated brake lever 36 provided with a rubber, film-engaging cushion 37 ; or automatically by means of a pusher 35 on the end of a spring wire 33 which is moved towards the film by a cam slot 31 in a plate 29 having a finger 30 engaging the film edge and riding into a notch thereon under the influence of a spring 32.